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In 1912, William Stern, who was a US psychologist, mentioned for the first time what is now known as the intellectual coefficient (IQ), which he described as the value that is commonly associated with the levels of intelligence that people possess.

This I determine through the results of a series of psychological tests that he performed.

As a result of this, the famous IQ Test or IQ test was born, which are still used today.

The IQ that a person possesses is the resulting number derived from a standard test that measures all the cognitive abilities of a certain person in relation to their age group.

We commonly hear that if a person has a high IQ, their academic and work performance is amazing and outstanding of other people.

The standard IQ in an age group is 100. If a person is over that amount, for example have an IQ of 118, that person is above the average IQ compared to people his age.

If a person's IQ is less than 100, that person's level of intelligence is low.

But if the IQ is a number that far exceeds 100, that person is gifted.